So, if TOR is truly "WoW in Space", why did it not grow to 14+ million subscribers? Because Carcifier is right, for the most part... Most people are unwilling to pay a monthly fee for the same old shit, with different paint.... especially for the long term.

That's pretty much it, in a nutshell. TOR ended up being like a lot of other cookie cutter MMOs that people have seen many times before. And as a result, they quickly left.